Spirometer.



PATENTED MAY 29, 1906.

J. A. MORRIS.

SPIROMETER.

APPLICATION FILED JAN. a0, 1905.

mlmmmmmlw mn v t e and preferably follo UNITED STATES;

PATENT OFFICE;

Specification Of LOttQll Patent.

PntentedIay 29, 1906.

lyplloation filed January 30,1905. Berlnlli'o. 848308.

To all whom it may concern:

Be it known that 1, lines A. Morons, a citizen of the United States, residin at Atlanta, in the county of Fulton and tate'of Georgia, have invented certain new and useful Im rovements in S irometers, of which the fol owing is a specification.

This invention re ates to improvements in spirometers or devices for testing the lungs.

The object ofmy invention is to produce a device of this kind that can be chea ly man ufactured-a'nd that will be adapted or popular use.

A further ob'ect is to so construct the device that it will not be liable to get out of order under ordinary uses.

Having the aforego' and other objects of general utility in view, have produced the device shown in preferred and modified forms in the accom anying drawings, which form a part of t 's application, and in which Figure 1 is a view, partly in vertical section and partly in elevation, of a preferred form of my device. Fig. 2 is a similar view showing a modified form of my invention; and Fig. 3 is a top lan view of the cap-plate, which is a det of the device.

Referring to the drawings in detail, and especially Fig. 1, it will be seen that A represents a glass bottle of ordinary cylindrical form having the usual neck portion a, terminating at the top in a mouth, the latter bein partially closable by the top or cap o in w 'ch are formed a central opening a and a smaller 0 ening a at one side of the'central opening. he central opening a is adapted to receive and serve as a guide for the tube C, which may be'of glass or other suitable material and which is provided on its surface with a graduated scale extending for a portion of its length and is formed with a flaring and 0 en lower end 0'. Arm. ed within the botthe contour of the inner walls is a tube (1, aving its lower portion bent at an angle, as at d, and having the extreme end bent upwardly, as at (1 Connected with the upturned end (1 of the tube (1 is a rubber bulb E, formed with a centrally-disposed open neck which is ada ted to receive and embrace the portion (1? o the tube (1, and, if necessary, a light joint can be formed at this point'by re' orcing the con- -apparent that upon blowi ca b. The capserves both as a nection with a cord or wire 11', as indicated in Fig. 1. Attached to the up er and of the tu e d is a flexible pipe f, to t e outer end of which is secured a mouth iecef. v

From the construction escribed' it will be through the mouthpiece f, pipe f, andtube d the bulb E will be inflated, whereby'its expanding walls will press upwardly against the lower end of the tube 0, thereby pushing the latteru wardly through the central opening I) in t e 'de and in icator for the tube 0. It Will\ e understood that the bulb will be of such size and capacity as to lift, when entirely inflated, the tu e O the full distance indicated by the graduated scale.

In the form of the device shown in Fig. 2

B represents a bottle of lass or other material of the same general orm as A, but having its lower end open, and in such 0 on end is inserted the bottom plate or dis 1), in which is formed a central 0 ening b The mouth of this bottle is closed by the cap a, made as above described, exce t without the o suing a. Arranged centra y of the bott e B is a tube G, having a graduated scale on the side thereof and formed with a circular base 9', which normally rests upon a bulb H, which is placed in the bottom of the bottle and rests upon the plate I). The bulb H is formed with an open neck h, which is adapted to receive the inner end of aflexible tube j, the outer end of which is rovided with a mouthpiece j. The bottle is supported by a base K, which may be of any suitable material and is formed with a horizontal opening in to permit the passage of the tube This form of my device is adapted to operate in the same manner as that shown in Fig. 1.

It will be understood that in the construction of the central graduated element C or G, I may use any material-such as wood, metal, or glass-and may make it solid or hollow and in any form in cross-section.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a spirometer, a bottle having a perforated cap, a tube slidably arran ed in said bottle and passing through sai cap, said tube provided with a graduated scale, an exrests upon and In testimony whereof -I lafiixmy signature m presence of two witnesses.

JAMES A. MORRIS.

Witnesses FRANK J. Smmnns, C. P. F. MoKEMIL. 

